硅藻土负载ZnO制备及填充PLA/PBAT复合材料性能
Preparation and Properties of ZnO-Supported Diatomite and Its Filled PLA/PBAT Composite
李美 1李玉富1
作者信息
- 1. 广东轻工职业技术学院,轻化工技术学院,广东高校高分子材料加工工程技术开发中心,广东省高分子材料先进加工工程技术研究中心,广东,广州 510300
- 折叠
摘要
将硅藻土原土作为载体,采用吸附-化学沉淀方法制备硅藻土负载ZnO(D-ZnO),用其填充制备抗菌性PLA/PBAT复合材料.对比研究了D-ZnO和市售纳米ZnO填充PLA/PBAT复合材料后,复合材料的抗菌、力学和结晶性能.结果表明,硅藻土表面成功负载六方纤锌矿型ZnO,负载率为12.81％.硅藻土原土对大肠杆菌和金黄色葡萄球菌基本没有抑菌作用.而D-ZnO对大肠杆菌和金黄色葡萄球菌具有较强的杀菌作用,0.25 mg/mL D-ZnO水溶液处理大肠杆菌和金黄色葡萄球菌杀菌率达到100％.当采用1份D-ZnO填充PLA/PBAT复合材料时,其对大肠杆菌和金黄色葡萄球菌杀菌率可以达到99.5％和98.9％;采用相同含量的纳米ZnO填充PLA/PBAT复合材料时,其对大肠杆菌和金黄色葡萄球菌杀菌率仅为91.7％和90.9％.当D-ZnO填充量为1份时,PLA/PBAT/D-ZnO复合材料的力学性能变化较小,结晶度由5.9％提高至17.5％;而采用相同含量的纳米ZnO填充时,PLA/PBAT/ZnO复合材料的力学性能约下降了50％,并且,纳米ZnO对PLA/PBAT成核具有抑制作用.
Abstract
ZnO-supported diatomite(D-ZnO)were obtained by adsorption-chemical precipitation method with raw diatomite as a support.And the prepared D-ZnO were used to fill PLA/PBAT composite.The antibacterial performance was compared among D-ZnO and nano-ZnO filled PLA/PBAT composite.The results indicated that diatomite surface was successfully loaded with ZnO hexagonal zinc type,the loaded rate was 10.28％.The raw diatomite has no inhibition effects against E.coli and S.aureus.But D-ZnO had remarkable antimicrobial activity against E.coli and S.aureus.When the concentration of D-ZnO was 0.25 mg/mL,the sterilization rate reached 100％.The sterilizing rate of PLA/PBAT composite prepared with filling 1 phr D-ZnO against E.coli and S.aureus reached 99.5％and 98.9％,while only 91.7％and 90.9％for the same content of nano-ZnO filled PLA/PBAT composite against E.coli and S.aureus,respectively.The filling of 1 phr D-ZnO into PLA/PBAT resin had little influence on its mechanical properties,but the crystallinity increased from 5.9％to 17.5％.While the mechanical properties of nano-ZnO filled PLA/PBAT composite decreased by nearly 50％,and nano-ZnO inhibited PLA/PBAT nucleation.
关键词
硅藻土/纳米ZnO/PLA/PBAT/抗菌性能/力学性能Key words
diatomite/nano-ZnO/PLA/PBAT/antimicrobial property/mechanical property引用本文复制引用
基金项目
2020年广州市基础与应用基础研究项目()
出版年
2024
NETL
NSTL
万方数据